Mass flow meter
First Claim
1. A mass flow meter for flowing media that works on the Coriolis Principle, with a substantially straight measuring pipe carrying the flowing medium, at least one oscillator acting on the measuring pipe, means including at least one transducer detecting either one or both Coriolis forces and Coriolis oscillations based on Coriolis forces and producing a measured value of the mass flow, a carrier pipe that holds said measuring pipe, said oscillator and said transducer and at least one temperature sensor that detects the temperature of the measuring pipe to correct the measured value depending on the temperature of the measuring pipe, wherein the measuring pipe and the carrier pipe are connected to one another in a way that excludes relative axial movements, and the axial distance between the points connecting the measuring pipe and the carrier pipe corresponds to the oscillation length of the measuring pipe, characterized by the fact that a length-change sensor that detects changes in the oscillation length of the measuring pipe is provided for correcting the measured value depending on said oscillation length of and the stress on the measuring pipe.
1 Assignment
0 Petitions
Accused Products
Abstract
A mass flow meter for flowing media which works on the Coriolis Principle includes a straight measuring pipe carrying the flow medium, an oscillator acting on the measuring pipe and two transducers detecting Coriolis forces and/or Coriolis oscillations based on Coriolis forces. The meter also has a carrier pipe holding the measuring pipe, the oscillator and the transducers and two temperature sensors that detect the temperature of the measuring pipe and correct the measured value depending on the temperature of the measuring pipe. The measuring pipe and the carrier pipe are connected to one another in a way that excludes relative axial movements, and the axial distance between the connecting points of the measuring pipe carrier pipe represents the oscillation length of the measuring pipe. The mass flow meter is designed so that, in a simple way, the measured value is largely independent from temperature changes and from forces acting from the outside and so that a length-change sensor that detects changes in the oscillation length of the measuring pipe can correct the measured value depending on the oscillation length of and stress on the measuring pipe.
-
Citations
68 Claims
- 1. A mass flow meter for flowing media that works on the Coriolis Principle, with a substantially straight measuring pipe carrying the flowing medium, at least one oscillator acting on the measuring pipe, means including at least one transducer detecting either one or both Coriolis forces and Coriolis oscillations based on Coriolis forces and producing a measured value of the mass flow, a carrier pipe that holds said measuring pipe, said oscillator and said transducer and at least one temperature sensor that detects the temperature of the measuring pipe to correct the measured value depending on the temperature of the measuring pipe, wherein the measuring pipe and the carrier pipe are connected to one another in a way that excludes relative axial movements, and the axial distance between the points connecting the measuring pipe and the carrier pipe corresponds to the oscillation length of the measuring pipe, characterized by the fact that a length-change sensor that detects changes in the oscillation length of the measuring pipe is provided for correcting the measured value depending on said oscillation length of and the stress on the measuring pipe.
- 44. A mass flow meter for flowing media that works on the Coriolis Principle, with a substantially straight measuring pipe carrying the flowing medium, at least one oscillator acting on the measuring pipe, at least one transducer detecting either one or both Coriolis forces and Coriolis oscillations based on Coriolis forces and producing a measuring value of the mass flow, a carrier pipe that holds said measuring pipe, said oscillator and said transducer and two temperature sensors for detecting the temperature of the measuring pipe to correct the measuring value depending on the temperature of the measuring pipe wherein the measuring pipe and the carrier pipe are connected to one another in a way that excludes relative axial movements, and the axial distance between the points connecting the measuring pipe and the carrier pipe corresponds to the oscillation length of the measuring pipe and wherein the two temperature sensors are electrically connected in series whereby only two external connections are required from both temperature sensors.
Specification